I am trying to make a query using Jena ARQ as follows:
static public final String NL = System.getProperty("line.separator") ;
//some codes
String prolog = "PREFIX rdf: <"+ RDF.getURI()+"> PREFIX rdfs:
<"+RDFS.getURI()+"> PREFIX myproject:
<http://www.myproject.com/ontologies/myproject.owl#>" ;
String queryString = prolog + NL + "SELECT ?individu WHERE {?individu rdf:type
myproject:Plant. ?individu myproject:height ?height. FILTER(?height <= 6.0).
?individu myproject:diameter ?diameter. FILTER(?diameter = 0.5)} ORDER BY
?individu" ;
//some codes
Using this code my program works well. As we can see that I use constant filter
values for height and diameter (6.0 and 0.5 respectively). However actually
what I want is not a constant filter values. Instead I want variable filter
values. This is similar to PreparedStatement in MySQL. I need this because the
query must change dynamically based on user input.
So, my question is: how can I make a query using variable filter value?
Thanks.
Iman Paryudi
